this derivation will be built: /nix/store/lanj39hrlsv7c94asbhkn88ii4h64jpi-treefmt.toml.drv this path will be fetched (6.2 MiB download, 30.3 MiB unpacked): /nix/store/ynh6v4sn9p8dk7w5ls8rd1kk3iik7148-nickel-1.18.0 building '/nix/store/lanj39hrlsv7c94asbhkn88ii4h64jpi-treefmt.toml.drv' treefmt.toml> structuredAttrs is enabled upload niks3: ok